geotagging for user sign-up

Add functionality so when a user creates their profile, their current location gets saved into the Parse database as a Parse GeoPoint formatted location.  

Clean up files related to Geolocation module.

Reorganized Sell-description architecture (removed sell.js file, as all it did was create a module that was injected with the controller module; this was unnecessary since the module for the controller module could just be used as the "sell" module).